cannot resolve method getSupportActionBar().setDisplayHomeAsUpEnabled(true);

Question

I am using Android Studios, however, I am unable to add the below two methods as it says that it cannot resolve them.

 getSupportActionBar().setDisplayHomeAsUpEnabled(true);

  getSupportActionBar().setTitle("Detail")

;

Answer 1

Your issue is that you are not extending the AppCompatActivity:

Change:

 public class First extends FragmentActivity

with:

 public class First extends AppCompatActivity

As you can check in the doc the getSupportActionBar() method depends on the AppCompatActivity.